Crawlspace periscope air vent



FIG. 1 is a front right isometric view of a crawlspace periscope air vent showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side plan view thereof;

FIG. 6 is a left side plan view thereof; and,

FIG. 7 is a back plan view. 

The ornamental design for a crawlspace periscope air vent, as shown. 